Rog, You must have started wearing diapers recently. Kids are naturally inquisitive and if you had been using diapers for more than a year or two, they would already know about it. It's not easy to wash and dry cloth diapers and hang plastic pants up to dry without being discovered eventually. It's probable that their questions are an attempt to confirm what they already know or suspect. Give them an honest answer and don't be embarrassed about it. Both of my daughters (13 and 22) know I wear diapers at night and it doesn't bother them. At my age I sometimes fall asleep watching a late movie on TV, and one of them will usually remind me to go put a diaper on if they see me nodding off. Not having to be secretive and having support from your family makes dealing with the problem a lot easier.